| Modified graphene based adsorbents for deep desulfurization of DBT in model fuel |
| Paper ID : 1253-UFGNSM-FULL |
| Authors: |
|
Mohammad Mahdi Ahadian *1, Sotoudeh Sedaghat- Hoor2, Majid Jaafarian3, Shadie Hatamie4 1Sharif University of Technology, Azadi Ave., 14588-89694, Tehran, Iran 2Tarasht dormitory- Hosseinmardi Alley - Azadi Street - Tehran - Iran 3Faculty of Science K. N. Toosi University of Technology 4Institute for Nanoscience and Nanotechnology (INST), Sharif University of Technology |
| Abstract: |
| Reducing sulfur content in liquid fuels to less than 10 ppm is a necessary demand due to environmental concerns. Removal of dibenzothiophene (DBT) from fuels is challenging and the adsorption method is a good candidate. In this research, adsorptive desulfurization kinetic has been investigated on graphene and modified graphene adsorbents. First, graphene oxide was synthesized using modified Hummers’ method. Different modified graphene samples were prepared using carbon black (CB) and nickel. The structure of adsorbents was characterized using XRD, FE-SEM, EDS, and FT-IR. Furthermore. A model fuel contains DBT in n-octane with an initial concentration of 100 ppm has been used and the DBT concentrations were measured by UV-Vis. The prepared powders were exposed to DBT in batch configuration. Adsorption isotherm and kinetic data for graphene-based adsorbents were obtained by analyzing the concentration versus time and at different concentrations. The adsorption capacity of modified structures could reach 40 mg of sulfur for one gram of adsorbent. CB-modified form of graphene revealed enhanced adsorption capacity. However, the adsorption rate on pure graphene was higher than other samples. |
| Keywords: |
| Adsorptive desulfurization, Graphene, Carbon black, Kinetic investigation, Adsorption isotherms |
| Status : Paper Accepted (Oral Presentation) |
